Sigma working on APS-C 50-140 f/2.8 and an external zoom full frame 70-200 f/2.8
A couple of optical formula patents from Sigma have appeared. There is…
Sigma Teasing New Faster Than f/2.8 Zoom?
The Sigma Austria Facebook page is teasing a new lens to be…
Sigma Announces Their Black Friday Deals
RONKONKOMA, N.Y.--(BUSINESS WIRE)--Sigma Corporation of America, a leading DSLR lens and camera…
